On Thursday, April 26, 2018 at 4:12:41 AM UTC, Brent wrote:
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> On 4/25/2018 7:44 PM, [email protected] <javascript:> wrote:
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> On Thursday, April 26, 2018 at 2:17:31 AM UTC, Brent wrote: 
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>> On 4/25/2018 6:39 PM, [email protected] wrote:
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>> *On its face it's absurd to think the SoL is invariant for all observers 
>> regardless of the relative motion of source and recipient, but it has 
>> testable consequences. The MWI has no testable consequences, so it makes no 
>> sense to omit this key difference in your historical comparisons with other 
>> apparent absurdities in physics. Moreover when you factor into 
>> consideration that non locality persists in the many worlds postulated -- 
>> assuming you accept Bruce's analysis -- what exactly has been gained by 
>> asserting the MWI? Nothing as far as I can tell. And the loss is 
>> significant as any false path would be. AG*
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>> It's one possible answer to the question of where the Heisenberg cut is 
>> located (the other is QBism).  It led to the theory of decoherence and 
>> Zurek's theory of quantum Darwinism which may explain Born's rule.
>>
>> Brent
>>
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> * I've always found the Heisenberg Cut to be a nebulous concept, a kind of 
> hypothetical demarcation between the quantum and classical worlds. *
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> That's the problem with it; it doesn't have an objective physical 
> definition.  Bohr regarded it as a choice in analyzing an experiment; you 
> put it where ever was convenient.
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> *What kind of boundary are we talking about, and how could the MWI shed 
> any light on it, whatever it is? AG *
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> In MWI there is no Heisenberg cut; instead there's a splitting of worlds 
> which has some objective location in terms of decoherence.
>
> Brent
>

The Heisenberg Cut is too vague and ill-defined to shed light on anything, 
and to say the MWI is helpful is adding another layer of confusion. AG 

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